Coronary sulcus

atrioventricular groovecoronary groove
The atria of the heart are separated from the ventricles by the coronary sulcus (also called coronary groove, auriculoventricular groove, atrioventricular groove, AV groove).wikipedia
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Heart

cardiachuman heartapex of the heart
The atria of the heart are separated from the ventricles by the coronary sulcus (also called coronary groove, auriculoventricular groove, atrioventricular groove, AV groove).
This distinction is visible also on the surface of the heart as the coronary sulcus.

Small cardiac vein

small cardiac
Its position is marked by the location of the right coronary artery and small cardiac vein.
The small cardiac vein runs in the coronary sulcus between the right atrium and ventricle and opens into the right extremity of the coronary sinus.

Circumflex branch of left coronary artery

left circumflex arterycircumflex branchcircumflex artery
The location of the left coronary sulcus is marked by the circumflex branch of left coronary artery and coronary sinus.
It follows the left part of the coronary sulcus, running first to the left and then to the right, reaching nearly as far as the posterior longitudinal sulcus.

Right coronary artery

right coronaryright coronary arteriescoronary arteries
Its position is marked by the location of the right coronary artery and small cardiac vein.
It travels down the right coronary sulcus, towards the crux of the heart.

Ventricle (heart)

ventricleleft ventricleright ventricle
The atria of the heart are separated from the ventricles by the coronary sulcus (also called coronary groove, auriculoventricular groove, atrioventricular groove, AV groove).

Coronary sinus

cardiac vein
The location of the left coronary sulcus is marked by the circumflex branch of left coronary artery and coronary sinus. On the posterior surface of the heart, the coronary sulcus contains the coronary sinus.

Pulmonary artery

pulmonary arteriespulmonary trunkpulmonary artery pressure
The structure contains the trunks of the nutrient vessels of the heart, and is deficient in front, where it is crossed by the root of the pulmonary trunk.

Atrium (heart)

right atriumatrialeft atrium
The atria of the heart are separated from the ventricles by the coronary sulcus (also called coronary groove, auriculoventricular groove, atrioventricular groove, AV groove).

Posterior interventricular sulcus

posterior longitudinal sulcusposterior interventricular sulciposterior longitudinal sulci

Coronary circulation

coronary arteriescoronarycoronary artery
The circumflex artery arises from the left coronary artery and follows the coronary sulcus to the left.

Crux cordis

crux of the heart
The crux cordis or crux of the heart (from Latin "crux" meaning "cross") is the area on the lower back side of the heart where the coronary sulcus (the groove separating the atria from the ventricles) and the posterior interventricular sulcus (the groove separating the left from the right ventricle) meet.

Coronary arteries

coronary arterycoronaryarteries
It travels down the right coronary sulcus, towards the crux of the heart.

Common ostrich

ostrichesostrichStruthio camelus
It then moves along the coronary groove and continues on into the tissue as interventricular branches toward the apex of the heart.

Right marginal vein

It passes along the inferior margin of the heart and joins the small cardiac vein (sometimes known as the right coronary vein) in the coronary sulcus, or opens directly into the right atrium.

Stannius ligature

By tying a ligature as a constriction between the sinus venosus and the atrium in the frog and also one around the atrioventricular groove, Stannius was able to demonstrate that the muscle tissues of the atria and ventricles have independent and spontaneous rhythms.